1. Professor, Dept. of Civil Engineering, National Taiwan Univ., No. 1 Roosevelt Rd., Sec. 4, Taipei 10617, Taiwan (corresponding author).
2. Professor, Dept. of Civil Engineering, National Taiwan Univ., No. 1 Roosevelt Rd., Sec. 4, Taipei 10617, Taiwan; and, CEO and Chief R&D Officer, Ruentex Group, 14F., No. 308, Section 2, Bade Rd., Taipei 104, Taiwan.
3. A.J. Clark Chair Professor, Dept. of Civil and Environmental Engineering, Univ. of Maryland, 1173 Glenn L. Martin Hall, No. 1188, College Park, MD 20742-3021.
4. Ph.D. Candidate, Div. of Construction Engineering and Management, Dept. of Civil Engineering, National Taiwan Univ., No. 1 Roosevelt Rd., Sec. 4, Taipei 10617, Taiwan.